Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/82-15 | 185/78-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.65 (651.6) | 26.36 (669.6) | 0.71 (18) 2.8% |
| Width inches (mm) | 6.5 (165) | 7.28 (185) | 0.79 (20) 12.1% |
| Circum. inches (mm) | 80.59 (2047.06) | 82.82 (2103.61) | 2.23 (56.55) 2.8% |
| Sidewall Height inches (mm) | 5.33 (135.3) | 5.68 (144.3) | 0.35 (9) 6.7% |
| Revolutions per mile (km) | 786.17 (488.5) | 765.04 (475.37) | -21.13 (-13.13) -2.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.55 mph (33.08 km/h) |
| 25 mph (40.23 km/h) | 25.69 mph (41.35 km/h) |
| 30 mph (48.28 km/h) | 30.83 mph (49.61 km/h) |
| 35 mph (56.33 km/h) | 35.97 mph (57.88 km/h) |
| 40 mph (64.37 km/h) | 41.1 mph (66.15 km/h) |
| 45 mph (72.42 km/h) | 46.24 mph (74.42 km/h) |
| 50 mph (80.47 km/h) | 51.38 mph (82.69 km/h) |
| 55 mph (88.51 km/h) | 56.52 mph (90.96 km/h) |
| 60 mph (96.56 km/h) | 61.66 mph (99.23 km/h) |
| 65 mph (104.61 km/h) | 66.8 mph (107.5 km/h) |
| 70 mph (112.65 km/h) | 71.93 mph (115.77 km/h) |
| 75 mph (120.7 km/h) | 77.07 mph (124.04 km/h) |
| 80 mph (128.75 km/h) | 82.21 mph (132.3 km/h) |
| 85 mph (136.79 km/h) | 87.35 mph (140.57 km/h) |
| 90 mph (144.84 km/h) | 92.49 mph (148.84 km/h) |
| 95 mph (152.89 km/h) | 97.62 mph (157.11 km/h) |
| 100 mph (160.93 km/h) | 102.76 mph (165.38 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1947 | 2262 | 2436 | 2543 | 2659 | 2742 | 2833 | 2941 | 3090 | 3239 | 3405 | 3538 | 3778 | 4043 | 4250 | 4383 | 4457 | 4730 | 5112 | 5940 |
Better Fuel Economy Factory Ratios Increased Power
